Encode and decode classical zigzag transposition ciphers with wave matrix inspection.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Select Encrypt or Decrypt mode.
Set the number of rails (depth) using the slider.
View the wave matrix visualization and copy the transposed output.
Characters of the message are written downwards and upwards on successive 'rails' of an imaginary fence in a zigzag pattern, then read off in horizontal rows.
It is a transposition cipher—the original characters are preserved without modification, but their positions are permuted.
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